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    <title>Document</title>
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    <script>
        //  数组转化为字符串
        // 1. toString() 将数组转换为字符串
        var arr = [1, 2, 33, '项羽', '吕布'];
        var result = arr.toString(); // 转化为字符串
        console.log(typeof result); // 判断数据类型
        console.log(result); // 1,2,33,项羽,吕布

        //2, join（分隔符）
        console.log(arr.join()); // 1,2,33,项羽,吕布   与toString等效
        console.log(arr.join("—")); // 1—2—33—项羽—吕布  填啥输啥
    </script>
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